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fireattack said:
put them in
"C:\Program Files (x86)\Adobe\Adobe Photoshop CS5\Plug-ins\Filters\" or similar dir. For greyc don't forget "Greyc-helper.bin" file.

And there're under filter menu in OS (very bottom).
That solved the problem and the Greyc filter shows up under the noise filters in the filters list and the Unsharp Mask 2 now shows up in the filters list also. Thanks for the help.